Answer: LIGHTSPEED
LIGHTSPEED is a crossword puzzle answer that we have spotted 4 times.
Referring Clues:
- 186,000 miles per second
- What "c" might mean
- Velocity that's impossible to attain
- Special relativity limit
Last Seen In:
- Netword - October 24, 2015
- Wall Street Journal - April 11, 2014
- LA Times - February 22, 2014
- New York Times - November 30, 2009
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